2001

6.5

2021

6.5

1988

4.6

1970

4.4

2000

6.6

1952

6.0

2010

0.0

2005

6.1

2014

7.2

2006

6.3

1958

6.5

2017

9.0

2015

10.0

1997

7.0

2008

6.3

1999

7.5

2004

6.4

2011

9.0

2025

0.0

2016

7.5